Yes. Under Illinois marijuana laws, adults 21 and older can legally buy cannabis from state-licensed dispensaries and possess up to 60 grams of flower, 10 grams of concentrate and 1,000 milligrams of THC in infused products if they live in Illinois, or half those amounts if they are visitors. The higher limits took effect June 12, 2026, when SB 3222 became law. Home growing is allowed only for registered medical patients, and public use is not protected.
Illinois legalized adult use through its legislature in 2019, and the law took effect on January 1, 2020. In 2026 lawmakers rewrote large parts of the program: higher possession limits, drive-through windows, later store hours, a bigger medical market and a new hemp law. This guide explains the rules as of October 2026. It is general information, not legal advice.
Illinois Cannabis Laws at a Glance
| Topic | The rule in Illinois | Source |
|---|---|---|
| Legal status | Legal for adults 21+ and for registered medical patients | 410 ILCS 705/10-5 |
| Legal age | 21+ with valid photo ID; medical patients under 21 only through the medical program | 410 ILCS 705/10-15 |
| Possession, residents | 60 g flower, 10 g concentrate, 1,000 mg THC in infused products | 410 ILCS 705/10-10(a) |
| Possession, visitors | 30 g flower, 5 g concentrate, 500 mg THC in infused products | 410 ILCS 705/10-10(b) |
| Home grow | Registered medical patients only: 5 plants over 5 inches tall per household | 410 ILCS 705/10-5(b) |
| Store hours | 6 a.m. to 2 a.m., subject to local zoning | 410 ILCS 705/15-70(j) |
| Public use | Not protected in any public place, in vehicles or near people under 21 | 410 ILCS 705/10-35 |
| Driving | 5 ng/mL THC in whole blood (10 ng/mL in other bodily substance) within 2 hours of driving is a DUI | 625 ILCS 5/11-501.2 |
| Taxes | 10%, 20% or 25% purchaser excise tax plus sales tax and up to 3% to 3.75% local cannabis tax | Illinois Department of Revenue |
| Regulators | IDFPR (dispensaries), Department of Agriculture (growers, hemp), Department of Public Health (medical registry) | IDFPR |
Is Marijuana Legal in Illinois?
Yes. The Cannabis Regulation and Tax Act, passed as HB 1438 and signed in 2019 as Public Act 101-27, made it legal under state law, starting January 1, 2020, for adults 21 and older to possess, buy and use cannabis within set limits, under 410 ILCS 705/10-5. The state’s medical program continues alongside it under the Compassionate Use of Medical Cannabis Program Act.
The biggest change since then came on June 12, 2026, when Gov. JB Pritzker signed SB 3222, Public Act 104-0463. Most changes took effect that day, per the IDFPR fact sheet.
How Much Cannabis Can You Possess in Illinois
Illinois sets different limits for residents and visitors. The limits are cumulative under 410 ILCS 705/10-10.
Illinois residents 21 and older
- 60 grams of cannabis flower (up from 30 grams before June 12, 2026)
- 10 grams of cannabis concentrate (up from 5 grams)
- 1,000 milligrams of THC in cannabis-infused products (up from 500 mg)
Visitors 21 and older
- 30 grams of cannabis flower (up from 15 grams)
- 5 grams of cannabis concentrate (up from 2.5 grams)
- 500 milligrams of THC in infused products (up from 250 mg)
It is illegal to buy, or try to buy, an amount from a dispensary that would put you over your limit. Registered medical patients who grow at home may keep more than 60 grams of their own harvest, but anything above 60 grams must stay secured at the home where it was grown.
Penalties for possession outside the law
Possession that the Act does not cover, such as possession over the limit, is charged by weight under the Cannabis Control Act, 720 ILCS 550/4:
- 10 grams or less: civil violation, fine of $100 to $200
- More than 10 grams up to 60 grams: Class B misdemeanor
- More than 60 grams up to 100 grams: Class A misdemeanor (Class 4 felony for a repeat offense)
- More than 100 grams: felony, rising from Class 4 to Class 1 with weight
For anyone under 21 outside the medical program, possession is a civil law violation, and driving privileges can be suspended if it happened in a vehicle, under 410 ILCS 705/10-15.
Where You Can and Cannot Use Cannabis in Illinois
The Act does not protect cannabis use in many places, listed in 410 ILCS 705/10-35. “Public place” is defined broadly as anywhere a person could reasonably be expected to be observed by others, including all parts of state and local government parks, recreation areas, wildlife areas and playgrounds.
Not allowed
- Any public place, including sidewalks, streets and public parks
- Any motor vehicle, whether driving or parked
- School buses and the grounds of any preschool, primary or secondary school (medical exceptions apply)
- Knowingly close to anyone under 21 who is not a registered patient
- Smoking anywhere smoking is banned under the Smoke Free Illinois Act
Allowed
- Private residences, with the owner’s permission
- A dispensary or retail tobacco store that the city or county has authorized for on-site consumption, under 410 ILCS 705/55-25
Private businesses and landlords can still ban cannabis on their property.
Buying Cannabis in Illinois: Dispensaries, Hours and Drive-Throughs
- Licensed stores only: Adult-use cannabis must come from a dispensary licensed by the Illinois Department of Financial and Professional Regulation (IDFPR). As of September 10, 2026, IDFPR counted 288 adult-use dispensaries, including 178 opened by social equity lottery winners, according to its press release.
- ID: A valid, unexpired ID with a photo and date of birth is required, under 410 ILCS 705/15-85.
- Hours: Since June 12, 2026, dispensaries may operate from 6 a.m. to 2 a.m., subject to local zoning, under 410 ILCS 705/15-70(j). The old closing time was 10 p.m. Stores need municipal approval to extend hours.
- Drive-through and curbside: SB 3222 allows pickup and drive-through service. Each store must have its plan reviewed and approved by IDFPR first.
Medical Cannabis in Illinois
The medical program is run by the Illinois Department of Public Health, with dispensaries regulated by IDFPR. The list in 410 ILCS 130/10 includes cancer, chronic pain, PTSD, migraines, seizures, multiple sclerosis, autism and dozens more, and SB 3222 added endometriosis, ovarian cysts, uterine fibroids and female orgasmic disorder. The certifying exam may now be done by telemedicine.
Key patient rules after SB 3222:
- Supply: an “adequate medical supply” is 2.5 ounces of usable cannabis per 14 days, with waivers available through the Department of Public Health.
- More stores: starting September 10, 2026, any adult-use dispensary in good standing can opt in to a medical license. IDFPR issued the first 37 such licenses that day.
- Taxes: patients buying their medical supply at a licensed medical dispensary are exempt from the cannabis purchaser excise tax, beginning 90 days after the law took effect, under 410 ILCS 705/65-10(c). Medical cannabis is taxed at the lower food and drug sales tax rate, according to the Department of Revenue.
- Seeds: registered patients may buy cannabis seeds at licensed dispensaries for home growing.
Growing Cannabis at Home in Illinois
Recreational home growing is not legal in Illinois. Under 410 ILCS 705/10-5(b), only an Illinois resident 21 or older who is a registered qualifying patient may grow, and only under these rules:
- No more than 5 plants taller than 5 inches per household, no matter how many patients live there
- Plants must be in an enclosed, locked space and out of ordinary public view
- Growing only on residential property you lawfully occupy; landlords may prohibit it
- No selling or giving away plants or homegrown cannabis
A patient who breaks these rules faces Cannabis Control Act penalties and can lose home-grow privileges.
Driving and Cannabis in Illinois
A driver commits DUI by having, within 2 hours of driving, 5 nanograms or more of delta-9-THC per milliliter of whole blood, or 10 nanograms or more per milliliter of another bodily substance, under 625 ILCS 5/11-501(a)(7) and 625 ILCS 5/11-501.2. The numeric limit does not apply to registered medical patients unless impaired.
Using cannabis in the passenger area of a vehicle on a highway is a Class A misdemeanor, and so is carrying it outside a secured, sealed or resealable, odor-proof, child-resistant container, under 625 ILCS 5/11-502.15. SB 3222 eased one part of this: cannabis bought from a licensed dispensary no longer has to be out of reach if it stays in its sealed, odor-proof, child-resistant original packaging.
Crossing State Lines, Airports and Federal Land
- Neighboring states: Carrying cannabis across any state line is illegal under federal law, even into a state where cannabis is legal. See our Wisconsin, Missouri, Michigan and Minnesota guides.
- Flying and federal land: Carrying cannabis on a plane, even within Illinois, or onto federal property is illegal under federal law.
Illinois Cannabis Taxes in 2026
Adult-use buyers pay the cannabis purchaser excise tax under 410 ILCS 705/65-10:
- 10% on cannabis (not infused) with adjusted THC of 35% or less
- 25% on cannabis (not infused) with adjusted THC above 35%, with concentrates and vape products taxed by their THC level
- 20% on cannabis-infused products such as edibles
On top of that come the regular sales tax where the store is located and any local cannabis retailers’ occupation tax. Cities may add up to 3% under 65 ILCS 5/8-11-23. Counties may add up to 3.75% in unincorporated areas and up to 3% inside cities, under 55 ILCS 5/5-1006.8. The total depends on the address of the store.
Delta-8, THCA and Hemp Products in Illinois
SB 3222 tightened hemp in two steps. From June 12, 2026, the amended Industrial Hemp Act bars selling or giving intoxicating hemp-derived products to anyone under 21, and retailers must check ID for anyone who appears under 30.
On November 12, 2026, the Industrial Hemp Act is repealed and the new Illinois Hemp Act takes over. Under it, a hemp product sold to consumers may not contain synthesized cannabinoids, may not hold more than 0.4 milligrams of total THC per container (THCA counts), and may not be meant for smoking or vaping. A product that does not meet the hemp definition is treated as cannabis under state law. The federal hemp redefinition runs on a split schedule: cannabinoids the plant cannot naturally produce, such as THC-O, lose hemp status November 12, 2026, and the rest, including delta-8 made from CBD and the per-container cap, follows December 11, 2026. For shoppers, that means most delta-8 products, smokable THCA flower and strong hemp gummies cannot legally be sold as hemp in Illinois after that date.
What Changed in Illinois Cannabis Law Recently
- SB 3222 (signed June 12, 2026): doubled possession limits, allowed 2 a.m. closing, drive-through and curbside service, eased vehicle storage rules for sealed purchases, and expanded “minor cannabis offense” records eligible for expungement from 30 grams to 60 grams.
- Federal rescheduling (April 2026): marijuana held under a state medical license moved to Schedule III. Adult-use cannabis remains Schedule I while a broader proceeding is on hold. Details are in our federal law guide.
From the editor, James Buddsey: Illinois spent most of 2026 catching up with its neighbors, and the new limits are generous by Midwest standards. The rules that trip people up have not changed: no smoking in the car, no smoking in the park, and nothing crosses the Wisconsin or Indiana line.
Illinois Marijuana Laws FAQ
Is weed legal in Illinois?
Yes. Adults 21 and older can buy cannabis at licensed dispensaries and possess it within state limits. Registered medical patients have separate rules and higher allowances.
How much weed can you carry in Illinois?
Residents may possess 60 grams of flower, 10 grams of concentrate and 1,000 mg of THC in infused products. Visitors may possess 30 grams of flower, 5 grams of concentrate and 500 mg of THC in infused products, under 410 ILCS 705/10-10.
Can tourists buy weed in Illinois?
Yes. Adults 21 and older with valid photo ID can buy at licensed dispensaries, up to the visitor limits.
Can you grow weed in Illinois?
Only registered medical patients who are Illinois residents 21 or older may grow, up to 5 plants per household in a locked space out of public view. Recreational home growing is illegal.
Can you smoke weed in public in Illinois?
No. State law does not protect use in any public place, any motor vehicle, on school grounds or near people under 21. Use is allowed in private homes and in on-site consumption spaces that a local government has approved.
What is the THC limit for driving in Illinois?
5 ng/mL of delta-9-THC in whole blood, or 10 ng/mL in another bodily substance, within 2 hours of driving is a DUI. Impairment can be charged at any level.
Is delta-8 or THCA legal in Illinois?
Since June 12, 2026, intoxicating hemp products cannot be sold to anyone under 21. From November 12, 2026, the new Illinois Hemp Act caps consumer hemp products at 0.4 mg total THC per container and bans synthesized cannabinoids such as most delta-8.
More State Cannabis Law Guides
Compare Illinois with every other state in our state-by-state cannabis law guides, read the latest on federal marijuana law, or check nearby states: Michigan, Missouri, Wisconsin and Minnesota.
General information about Illinois cannabis law as of October 2026, not legal advice.